The Day Will Dawn(1942)

Sports journalist Colin Metcalfe is picked for the job of foreign correspondent in Norway when Hitler invades Poland. On the way to Langedal his boat is attacked by a German U-Boat, however when he tells the navy about it they do not believe him and, to make matters worse, he is removed from his job. When German forces invade Norway, Metcalfe returns determined to uncover what is going on and stop the Germans in their tracks.